// https://syzkaller.appspot.com/bug?id=4522c4fb3896c243a66d4bda935f828e80899c2c
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/futex.h>
#include <pthread.h>
#include <sched.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/prctl.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}
#include <errno.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>

const int kFailStatus = 67;
const int kRetryStatus = 69;

static void fail(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
}

static uintptr_t syz_open_dev(uintptr_t a0, uintptr_t a1, uintptr_t a2)
{
  if (a0 == 0xc || a0 == 0xb) {
    char buf[128];
    sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1,
            (uint8_t)a2);
    return open(buf, O_RDWR, 0);
  } else {
    char buf[1024];
    char* hash;
    strncpy(buf, (char*)a0, sizeof(buf));
    buf[sizeof(buf) - 1] = 0;
    while ((hash = strchr(buf, '#'))) {
      *hash = '0' + (char)(a1 % 10);
      a1 /= 10;
    }
    return open(buf, a2, 0);
  }
}

static void loop();

static void sandbox_common()
{
  prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
  setpgrp();
  setsid();

  struct rlimit rlim;
  rlim.rlim_cur = rlim.rlim_max = 128 << 20;
  setrlimit(RLIMIT_AS, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 8 << 20;
  setrlimit(RLIMIT_MEMLOCK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_FSIZE, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 1 << 20;
  setrlimit(RLIMIT_STACK, &rlim);
  rlim.rlim_cur = rlim.rlim_max = 0;
  setrlimit(RLIMIT_CORE, &rlim);

#define CLONE_NEWCGROUP 0x02000000

  if (unshare(CLONE_NEWNS)) {
  }
  if (unshare(CLONE_NEWIPC)) {
  }
  if (unshare(CLONE_NEWCGROUP)) {
  }
  if (unshare(CLONE_NEWUTS)) {
  }
  if (unshare(CLONE_SYSVSEM)) {
  }
}

static int do_sandbox_none(void)
{
  if (unshare(CLONE_NEWPID)) {
  }
  int pid = fork();
  if (pid < 0)
    fail("sandbox fork failed");
  if (pid)
    return pid;

  sandbox_common();
  if (unshare(CLONE_NEWNET)) {
  }

  loop();
  doexit(1);
}

static void test();

void loop()
{
  while (1) {
    test();
  }
}

struct thread_t {
  int created, running, call;
  pthread_t th;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
  struct thread_t* th = (struct thread_t*)arg;
  for (;;) {
    while (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE))
      syscall(SYS_futex, &th->running, FUTEX_WAIT, 0, 0);
    execute_call(th->call);
    __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
    __atomic_store_n(&th->running, 0, __ATOMIC_RELEASE);
    syscall(SYS_futex, &th->running, FUTEX_WAKE);
  }
  return 0;
}

static void execute(int num_calls)
{
  int call, thread;
  running = 0;
  for (call = 0; call < num_calls; call++) {
    for (thread = 0; thread < sizeof(threads) / sizeof(threads[0]); thread++) {
      struct thread_t* th = &threads[thread];
      if (!th->created) {
        th->created = 1;
        pthread_attr_t attr;
        pthread_attr_init(&attr);
        pthread_attr_setstacksize(&attr, 128 << 10);
        pthread_create(&th->th, &attr, thr, th);
      }
      if (!__atomic_load_n(&th->running, __ATOMIC_ACQUIRE)) {
        th->call = call;
        __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
        __atomic_store_n(&th->running, 1, __ATOMIC_RELEASE);
        syscall(SYS_futex, &th->running, FUTEX_WAKE);
        struct timespec ts;
        ts.tv_sec = 0;
        ts.tv_nsec = 20 * 1000 * 1000;
        syscall(SYS_futex, &th->running, FUTEX_WAIT, 1, &ts);
        if (running)
          usleep((call == num_calls - 1) ? 10000 : 1000);
        break;
      }
    }
  }
}

uint64_t r[1] = {0xffffffffffffffff};
uint64_t procid;
void execute_call(int call)
{
  long res;
  switch (call) {
  case 0:
    memcpy((void*)0x20265ff7, "/dev/sg#", 9);
    res = syz_open_dev(0x20265ff7, 0, 2);
    if (res != -1)
      r[0] = res;
    break;
  case 1:
    syscall(__NR_read, r[0], 0x20000000, 0x9a);
    break;
  case 2:
    *(uint16_t*)0x200006c0 = 0;
    *(uint16_t*)0x200006c2 = htobe16(0x88f8);
    *(uint16_t*)0x200006c4 = htobe16(-1);
    *(uint16_t*)0x200006c6 = htobe16(0x108);
    *(uint8_t*)0x200006c8 = 0;
    *(uint8_t*)0x200006c9 = 5;
    *(uint32_t*)0x200006ca = htobe32(-1);
    *(uint8_t*)0x200006ce = 0;
    *(uint8_t*)0x200006cf = 0;
    *(uint8_t*)0x200006d0 = 0;
    *(uint8_t*)0x200006d1 = 0;
    *(uint8_t*)0x200006d2 = 0;
    *(uint8_t*)0x200006d3 = 0;
    *(uint16_t*)0x200006d4 = htobe16(-1);
    *(uint32_t*)0x200006d6 = htobe32(-1);
    *(uint8_t*)0x200006da = 0;
    *(uint8_t*)0x200006db = 0;
    *(uint8_t*)0x200006dc = 0;
    *(uint8_t*)0x200006dd = 0;
    *(uint8_t*)0x200006de = 0;
    *(uint8_t*)0x200006df = 0;
    *(uint16_t*)0x200006e0 = htobe16(3);
    memcpy((void*)0x200006e2,
           "\xc1\xd0\x9f\xb2\xab\xa8\xfd\x23\xcc\x72\x9b\xff\xb3\x7a\x4d\x96"
           "\x60\xb6\x9f\x0b\x7c\x64\x18\x77\x9e\x4d\x5c\x9b\x19\x23\x97\x03"
           "\x62\xbc\x23\xa7\xb3\x00\x92\x94\xd9\x50\x10\x5b\x03\x02\x11\xe3"
           "\xa6\x4c\x62\xdd\xe9\x83\xcf\xbb\xde\x09\xeb\xa8\x73\xca\x94\x51"
           "\x04\xdd\x3e\xab\x8a\x25\xb9\xd9\xcd\x6b\x6b\x2a\x2e\x51\x5b\x6c"
           "\x07\x45\x2a\xb2\x75\xcf\xfc\x24\x95\x37\xcb\x1c\x36\x9e\x91\x98"
           "\x5b\x2e\x1e\xe7\x02\x7d\xe3\x65\x9a\xa4\x0c\xba\x3c\x2a\x3e\xef"
           "\x5b\xc1\xee\x32\xdf\xde\x10\xd8\x1c\xb6\xdf\x65\xa4\x6e\x31\xcd"
           "\x75\xa1\x1b\x90\xd6\x82\xa5\xfd\xcb\x40\x26\x22\x64\xc2\x5b\x2a"
           "\xca\xb8\x54\x72\xe8\xea\x8b\x92\xa8\xa8\x41\xf2\x77\x05\x06\xcb"
           "\xd3\xa9\xff\xea\xa2\x22\xcd\x47\x03\xa1\x1e\x6b\x1b\xd9\xb6\xf1"
           "\x20\xde\x14\xc1\x63\x1c\x20\x05\x81\xc4\x9e\x59\x63\xd9\x64\x67"
           "\x8c\xba\x6c\x17\xce\xc0\x4d\x26\x3c\xc2\xf0\x69\x80\x7d\x2b\xc4"
           "\x90\x60\x45\x52\xa2\x01\xb1\xd2\x5e\x27\xc3\x66\x58\xd9\xfc\x8c"
           "\x5b\xfb\xa9\xca\x93\xbe\xbb\xe7\xe1\xa5",
           234);
    syscall(__NR_write, r[0], 0x200006c0, 0x10c);
    break;
  }
}

void test()
{
  execute(3);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  for (procid = 0; procid < 8; procid++) {
    if (fork() == 0) {
      for (;;) {
        int pid = do_sandbox_none();
        int status = 0;
        while (waitpid(pid, &status, __WALL) != pid) {
        }
      }
    }
  }
  sleep(1000000);
  return 0;
}